Piano



FIG. 1 is a perspective view of a piano showing my new design;

FIG. 2 is a right side view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a front view thereof; and,

FIG. 5 is a top plan view thereof.

The broken lines and unshaded surfaces depict portions of the piano that form no part of the claimed design. 

CLAIM The ornamental design for a piano, substantially as shown and described. 